lab

answer the highlighted ones only

I already did the lab and attached the graphs

BApplied = MONI Bnet = B Applied + BEarth 2 2 But ? = Bapplied + B earth B Net downwards by B Earth 450 This enables v rmine the value of the background magnetic field. This exper relation nould produce the background field, an angle versus current curre igle versus field relationship, and a check against the force versus 1-9 1- 9 cm - 0.019 m. 16 16 loops 0.019 2 842 105Part C: Induction in a Second Solenoid In this part you will change the intensity of the eld in a solenoid by varying the current. The changing magnetic eld will induce an emf (potential) in the second coil. Sketch the setup for your lab report. Do not go over 10 volts when turning up the potential. Be sure to notice which probe channel is attached to each part ofthe solenoid. Procedure and Analysis: These two parts run together in this part. 1. U'I-Chb-IN 50.909?" 10. 11. 12. 13. 14. 15. 16. 1?. 18. 19. Start Logger Pro, you will probably get a potential versus time graph. Add a second graph and have each represent a single potential versus time graph. Zero the probes. Turn on the power supply with the knob turned all the way down. Start collecting. Turn the dial on the power supply up fairly slowly, let it sit at a value for a period of time, then turn it back down fairly quickly. Auto-t both segments (rising and falling) on your graphs. Compare the two graphs visually, look at the relationships. Use the examine function and the slope function to compare numerically. Now that you have the window sizes set, take another run, this time raise and lower the setting several times at different speeds. ls the highest peak related to the highest setting? If so, explain why this should be true, ifnot what is related to the highest induced peak. Check your conclusion several times in the next run. Describe the relationship between the sign ofthe induced emf and the power supply voltage. Save everything. Change the wires to the AC side of the power supply. Change the experimental set up to take 600 data points per second for a total of0.5 seconds. Turn on the power supply and set the dial to around 15 on the arbitrary scale. Collect data, this will only take 0.5 seconds. The analysis for this graph should include curve tting your results. Compare the two graphs as above. Curve t the results. Compare the fits to each other in detail Save your le and email it to yourself. let me know that you are nished with this part. Step asidefmove on. Part D: Tangent Galvanometer: The tangent galvanometer uses coils and a compass to measure current flow. What it "really" does is compare the magnetic field at the center of the coil to the magnetic field of the Earth. Since the Earth's magnetic field varies greatly, and in modern times is affected by noise from machinery, electricity and even from the metals used in modern construction methods (such as the structure that might be used to build a sturdy and long lived lab table.) Modern in this case means late 19" century. With the increased interest in electricity at that time, circuit based designs of meters became common and cheaper. The tangent galvanometer became a way of measuring magnetic fields instead. A quick web search will enable you to look at the craftsmanship that went into building tangent galvanometers in the early days. Currently the Hall Effect microchip allows for easy measurement of magnetic field strength so that the tangent galvanometer is used mostly for teaching purposes and in instrumentation museums. The circuit will be set up as shown in the diagram. Make sure that those who have Power Supply come before you have not changed the setup. Remember the DMM in should be SERIES with the rest of the circuit. R Use the DMM to measure current. The DMM ceramic resis. or is there to act as ballast (limit current). 9 Place the compass . the galvanometer and turn the setup so what the compass is Galvanometer pointing parallel to the plane of the loops. 1. determine the appropriate range of currents to cause a variable and large deflection of the compass needle. Be sure to include a description of how you arrived at the range. 2. Make a table of current versus angle of deflection, reverse the direction of current flow and repeat. You will need at least seven points on each side of the center. 3. Are the two directions symmetrical or related? 4. Plot the results on a graph; determine the mathematical relationship between current and deflection. 5. Count the true number of turns. Use the magnetic field strength equation for Bower for the coil (solenoid) and the following vector ideas to determine the magnetic field of the Earth (plus noise) on your bench. By definition the direction of the Earth magnetic field is the direction that a compass points. The force exerted by the field is proportional to the strength of the field, by the definition of force fields.C 0.1 Auto Fit for: Run 2 | Potential 1 -0.1 Pot 1 = A'sin(Bt+C)+D A: 0.07801 +/- 0.008900 B: 1.113 +/- 0.01958 0.3 C: 5.328 +/- 0.214 D: -0.002984 +/- 0.006214 Correlation: 0.5421 RMSE: 0.08483 V -0.5 0 10 :18.8 Ay:0.088) 15 Time (s) XJ Auto Fit for: Run 2 | Potential 2 Pot 2 = A*sin(Bt+C)+D A: 1.342 +/- 0.05550 B: 1.145 +/- 0.008541 C: 3.406 +/- 0.08452 D: 1.387 +/- 0.03924 Correlation: 0.8854 RMSE: 0.5032 V 10 20Part De Galvanometer . Compass should be oriented 1 "area vector I(A Imax = 1A M. = 47 * 10 # Tim -70 " 70 B. ( I) - Bapp ( 8 ) But A Bapplied Solenoid N: # of loops/ turns O I Bearth Bapp tano : Bearth N # loops n = g meter to . ... . Bapp Bearth tan ( @) Bol = Mul EXPODelete v Ic BCH Merge & Center $ ~ % 9 Conditional Format Cell Formatting as Table Styles Format v Chart 1 X LL I S Z O angle current 70 2.5 1.38 0.19 PART D 0.97 16 loops 84.2105263 0.61 -30 0.42 0.12 O o 05 -0.12 -0.25 -0.4 0.65 -0.85 -1.28 -1.941Part C: Induction in a Second Solenoid ( Mutual Induction) . 3 Data Sets Total " Need 2 Voltage Graphs 5 - " Insert" " Graph" 2 DC Data sets, 1# is to get a feel for it . 0 --3 V slowly (~25 ) ( End ) - V. (V) . Stay at ~ 3V for ~ 1 sec Repeat a few . ~ 3V - O quickly ( + 0.53 ) times + (s ) . 1 AC Data Set (4 = AB. A cose) - Function Generator replaces DC P.S. . 5.0 V @ 60 Hz - Logger Pro - "Experiment"- "Data Collection" Duration : 0.5s Sample Rate: 600 samples/ second